@nmstough, I appreciate that you are sharing your concerns and opinions. What a great way to learn from each other.
As you know, there are no slip connectors that work from 1 inch ABS (the flow meter material) to 3/4 inch copper. In order to allow the flow meter to swivel 360 degrees, we need to use a sharkbite-style coupler. The only coupler that meets the criteria has a ball valve. When we interviewed both irrigation professionals and customers, everyone was fine (or even happy!) with the ball valve.
Also, I said “wiggle room” not wiggling. Pipes have play, and so far in installations, there has been plenty to accommodate the fitting without a risk of damaging the system. Your system could be different! Could you send me a picture of your system so that I understand more about where you are coming from? And I want to learn about that. I have already taken note of every concern that you have already voiced.
You seem to know a lot about irrigation. Are you an irrigation professional? Perhaps you could join our professional consulting team; I could call you during R & D. PM me if you are interested.
At this point, it might be worth waiting and trying the installation first. Most importantly, I look forward to hearing from you after you receive the flow meter and install (or attempt to) it, then your feedback will be concrete and we will be able to respond to any miscalculations on our end.
Lastly, please forward the emails you mentioned in your first post. I’m really looking forward to reading them and cleaning up any misinformation.